聚苯胺改性石墨毡阴极电Fenton降解效能研究  

Study on electro-Fenton degradation efficiency of polyaniline modified graphite felt as cathode

作　　者：范聪颖 江博[1] 杨宇航 戴捷[1] FAN Congying;JIANG Bo;YANG Yuhang;DAI Jie(College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434000,China)

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434000

出　　处：《工业水处理》2022年第4期73-77,共5页Industrial Water Treatment

基　　金：国家自然科学基金(21173026);湖北省自然科学基金重点项目(2013CFA107);荆州市科技项目(2019EC61-14)。

摘　　要：电Fenton是电化学与Fenton技术相结合的一种高级氧化技术,具有铁泥产量少、无需投加H_(2)O_(2)等优点。电Fenton过程中O_(2)在阴极发生还原反应生成H_(2)O_(2),再与Fe^(2+)反应生成强氧化性的·OH,达到降解污染物的目的。阴极材料对电Fenton技术降解效果有一定影响。以硫酸和苯胺为原料,通过电聚合法改性石墨毡,研究了改性石墨毡(GF-N)的物理化学性能,并将其用于电Fenton降解印染废水实验。FT-IR、扫描电镜、接触角分析结果表明,GF-N表面成功负载上聚苯胺,含氧官能团增加,比表面积增大,接触角变小。实验结果表明,GF-N的吸附性能和产H_(2)O_(2)性能明显增强,120 min时,H_(2)O_(2)质量浓度从111 mg/L增加到158 mg/L,且稳定性较好。以石墨毡为阴极构建电Fenton体系降解印染废水,120 min时,GF-N阴极电Fenton体系的COD、氨氮去除率分别为56.76%和78.32%,相比未改性体系,COD、氨氮去除率分别增加了20.47%、33.30%。As an advanced oxidation technology combining electrochemistry and Fenton technology,electro-Fenton technology has the advantages of low iron sludge production and no H_(2)O_(2) injection.In the process of electro-Fenton,oxygen is reduced at the cathode to produce H_(2)O_(2),which then reacts with Fe^(2+) to produce·OH for degrading pollutants.The cathode material has a certain influence on the degradation effect of electro-Fenton technology.The physical and chemical properties of modified graphite felt(GF-N)were modified by electropolymerization using sulfuric acid and aniline as raw materials,and it was used in the experiment of electro-Fenton degradation of printing and dyeing wastewater.FT-IR,SEM and contact angle analysis results showed that the surface of GF-N was successfully loaded with polyaniline,and the oxygen-containing functional groups,the specific surface area increased,while the contact angle decreased.The experimental results showed that the adsorption and H_(2)O_(2) production performance of GF-N were significantly enhanced.H_(2)O_(2) mass concentration increased from 111 mg/L to 158 mg/L at 120 min with good stability.The electro-Fenton system was constructed by using graphite felt as the cathode to degrade the printing and dyeing wastewater.At 120 min,the COD and ammonia nitrogen removal rates of electro-Fenton system with GF-N as the cathode were 56.76%and 78.32%,respectively,which increased 20.47%and 33.30%,compared with the unmodified system.

关 键 词：聚苯胺 石墨毡 电FENTON 印染废水 

分 类 号：X703.1[环境科学与工程—环境工程]